and check the status of the device. The following shows a high-level view of the architecture: Once NGT is installed you can see the NGT Agent and VSS Hardware Provider services: The Linux solution works similar to the Windows solution, however scripts are leveraged instead of the Microsoft VSS framework as it doesn't exist in Linux distros. Upon being written to the local OpLog, the data is synchronously replicated to another one or two Nutanix CVM’s OpLog (dependent on RF) before being acknowledged (Ack) as a successful write to the host. App and DB), The snapshot schedule should be equal to your desired RPO, The retention policy should equal the number of restore points required per VM/file. With that stated, it is however still a best practice to have uniform blocks to minimize any storage skew. The figure shows the Stargates and disk utilization (available/total): The next section is the 'NFS Worker' section which will show various details and stats per vDisk. In certain scenarios the hypervisor may combine or split operations coming from VMs which can show the difference in metrics reported by the VM and hypervisor. Key Role: MapReduce cluster management and cleanup. Stay tuned! The following key terms are used throughout this section and defined in the following: The figure shows the high-level mapping of the conceptual structure: The figure shows a detailed view of the Objects service architecture: The Objects specific components are highlighted in Nutanix Green. This command enables or disables SNMPv3 only traps. Constructs called bridges manage the switch instances residing on the AHV hosts. Foreword. SSD devices store a few key items which are explained in greater detail above: The following figure shows an example of the storage breakdown for a Nutanix node’s SSD(s): NOTE: The sizing for OpLog is done dynamically as of release 4.0.1 which will allow the extent store portion to grow dynamically. The figure shows the 'Queued Curator Jobs' and 'Last Successful Curator Scans' section: Prism should provide all that is necessary in terms of normal troubleshooting and performance monitoring. It is possible to create multiple snapshot / replication schedules. The duration of the stun will depend on the number of vmdks and speed of datastore metadata operations (e.g. NOTE:  The data will only be migrated on a read as to not flood the network and allow for efficient cache utilization. Given the fact that we fully control AHV and the Nutanix stack this was an area of opportunity. A minimum of 3 FSVMs will be deployed as part of the File Server deployment. The hypervisor and CVM communicate using a private network on a dedicated vSwitch (more on this above). I treat this as I would any site on the WAN. echo "source ~/ncc/ncc_completion.bash" >> ~/.bashrc. The Cerebro service is broken into a “Cerebro Master”, which is a dynamically elected CVM, and Cerebro Slaves, which run on every CVM. In the case of KVM, iSCSI multi-pathing is leveraged where the primary path is the local CVM and the two other paths would be remote. In AHV deployments, the Controller VM (CVM) runs as a VM and disks are presented using PCI passthrough. that can be leveraged for additional network throughput. Today, the fragmentation overhead varies between 0.5 and 1 giving a total overhead of 1.5-2 per configured host failure. local CVM down, etc.). When a cluster is hibernated, the data will be backed up from the cluster to S3. Very similar to creating a remote site to be used for native DR / replication, a “cloud remote site” is just created. For example, every CVM doesn't need to know which physical disk a particular extent sits on, they just need to know which node holds that data, and only that node needs to know which disk has the data. The cloud-config input type is the most common and specific to CloudInit. Estimated demand is calculated using historical utilization values and fed into a smoothing algorithm. Here are some of the reasons for a jobs execution: The figure shows the 'Curator Jobs' table: The table shows some of the high-level activities performed by each job: Clicking on the 'Execution id' will bring you to the job details page which displays various job stats as well as generated tasks. The following figure shows an example of how this works when a snapshot is taken (NOTE: I need to give some credit to NTAP as a base for these diagrams, as I thought their representation was the clearest): The same method applies when a snapshot or clone of a previously snapped or cloned vDisk is performed: The same methods are used for both snapshots and/or clones of a VM or vDisk(s). The pre-freeze and post-thaw scripts are located in the following directories: ESXi has native app consistent snapshot support using VMware guest tools.


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